.__vs-layout > .__rail-is-vertical > .__bar-is-vertical::before {
    content: '';
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    border-radius: 10px;
    -webkit-animation: ant-progress-active 2.4s cubic-bezier(0.23, 1, 0.32, 1)
    infinite;
    animation: ant-progress-active 2.4s cubic-bezier(0.23, 1, 0.32, 1) infinite;
}
@-webkit-keyframes ant-progress-active {
    0% {
        opacity: 0.1;
        height: 0;
    }
    20% {
        opacity: 0.5;
        height: 0;
    }
    100% {
        opacity: 0;
        height: 100%;
    }
}
@keyframes ant-progress-active {
    0% {
        opacity: 0.1;
        height: 0;
    }
    20% {
        opacity: 0.5;
        height: 0;
    }
    100% {
        opacity: 0;
        height: 100%;
    }
}